JP2672243B2 - Flux for single-sided submerged arc welding and welding method using the same - Google Patents
Flux for single-sided submerged arc welding and welding method using the sameInfo
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- JP2672243B2 JP2672243B2 JP5070025A JP7002593A JP2672243B2 JP 2672243 B2 JP2672243 B2 JP 2672243B2 JP 5070025 A JP5070025 A JP 5070025A JP 7002593 A JP7002593 A JP 7002593A JP 2672243 B2 JP2672243 B2 JP 2672243B2
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Description
【０００１】[0001]
【産業上の利用分野】本発明は３本又はそれ以上の電極
を使用して行う片面サブマージアーク溶接技術に関し、
特に溶接速度が100〜200cm／分の高速で行う高能率な片
面サブマージアーク溶接用として好適のフラックス及び
それを使用した溶接方法に関する。FIELD OF THE INVENTION The present invention relates to a single-sided submerged arc welding technique using three or more electrodes,
Particularly, the present invention relates to a flux suitable for high-efficiency one-sided submerged arc welding performed at a high welding speed of 100 to 200 cm / min and a welding method using the flux.
【０００２】[0002]
【従来の技術】両面溶接においては、溶接速度が100cm
／分以上の多電極溶接法が多数提案されており、施工実
績の報告も多い。通常の両面１層の多電極溶接では溶け
込み深さも、板厚の約半分程度を確保すれば良く、比較
的容易に高速溶接が可能である。2. Description of the Related Art In double-sided welding, the welding speed is 100 cm.
Many multi-electrode welding methods of more than 1 / min have been proposed, and there are many reports of construction results. In the normal multi-electrode welding of one layer on both sides, the penetration depth should be about half of the plate thickness, and high-speed welding can be performed relatively easily.
【０００３】片面サブマージアーク溶接においても、施
工条件の改善により高速溶接を行う技術が提案されてい
る（特開平３−２３８１７４号、特開平３−２６８８９
６号）。In single-sided submerged arc welding as well, a technique for performing high-speed welding by improving the working conditions has been proposed (JP-A-3-238174, JP-A-3-26889).
No. 6).
【０００４】[0004]
【発明が解決しようとする課題】しかし、片面溶接にお
ける溶接速度の高速化は極めて困難である。片面溶接に
おいては、表側から溶接して裏ビードまで同時に形成す
る必要があることから、溶け込み形状が縦長に（深く）
なることと、溶接速度が高速になると溶融プールも溶接
線方向に長くなり、また冷却速度が速くなるために溶融
金属の凝固速度も速くなるという難点がある。このた
め、特に表ビードの幅が広がらず、形状が不安定にな
り、またアンダーカットが発生しやすくなるという問題
点があった。この欠点は、従来の提案されている技術の
ように、単に施工条件の改善のみでは、十分に解決でき
ていない。However, it is extremely difficult to increase the welding speed in single-sided welding. In single-sided welding, it is necessary to weld from the front side to the back bead at the same time, so the penetration shape is vertically long (deep).
When the welding speed becomes high, the molten pool also becomes long in the welding line direction, and the cooling speed becomes fast, so that the solidification speed of the molten metal becomes fast. Therefore, there is a problem that the width of the front bead is not widened, the shape becomes unstable, and undercut is likely to occur. This drawback cannot be sufficiently solved by merely improving the construction conditions as in the conventionally proposed technique.
【０００５】本発明はかかる問題点に鑑みてなされたも
のであって、高速片面サブマージアーク溶接の従来の問
題点を解消し、特に健全な表ビード及び裏ビードを得る
ことができる片面サブマージアーク溶接用フラックス及
びそれを使用した片面サブマージアーク溶接方法を提供
することを目的とする。The present invention has been made in view of the above problems, and solves the conventional problems of high-speed one-sided submerged arc welding, and can obtain particularly sound front and back beads. A flux for welding and a single-sided submerged arc welding method using the flux.
【０００６】[0006]
【課題を解決するための手段】本発明に係る片面サブマ
ージアーク溶接用フラックスは、重量％で、ＳｉＯ2；1
0〜20％、ＣａＯ；5〜15％、ＭｇＯ；20〜30％、ＴｉＯ
2；8〜18％、Ｆ；2〜8％及び鉄粉；10〜30％を含有し、
重量％で粒径が840μｍを超える粒子が20％未満、297乃
至840μｍの粒子が60％以上、297μｍ未満の粒子が20%
未満であり、見掛密度が1.05乃至1.30g/cm3であること
を特徴とする。The flux for single-sided submerged arc welding according to the present invention is, in weight%, SiO 2 ;
0-20%, CaO; 5-15%, MgO; 20-30%, TiO
2 ; 8-18%, F; 2-8% and iron powder; 10-30%,
Less than 20% of particles have a particle size of more than 840 μm in weight%, 60% or more of particles of 297 to 840 μm, and 20% of particles of less than 297 μm.
And the apparent density is 1.05 to 1.30 g / cm 3 .
【０００７】本発明に係る片面サブマージアーク溶接方
法は、重量％で、ＳｉＯ2；10〜20％、ＣａＯ；5〜15
％、ＭｇＯ；20〜30％、ＴｉＯ2；8〜18％、Ｆ；2〜8％
及び鉄粉；10〜30％を含有し、重量％で粒径が840μｍ
を超える粒子が20％未満、297乃至840μｍの粒子が60％
以上、297μｍ未満の粒子が20%未満であり、見掛密度が
1.05乃至1.30g/cm3のボンドフラックスを使用し、３電
極又はそれ以上の電極を使用して1.0乃至2.0m／分の速
度で溶接を行うことを特徴とする。The single-sided submerged arc welding method according to the present invention comprises, in weight%, SiO 2 ; 10-20%, CaO; 5-15.
%, MgO; 20~30%, TiO 2; 8~18%, F; 2~8%
And iron powder; 10 to 30% in weight% and particle size 840 μm
Less than 20% of particles exceed 60% of particles of 297 to 840 μm
As a result, less than 20% of particles are less than 297 μm, and the apparent density is
It is characterized in that 1.05 to 1.30 g / cm 3 of bond flux is used and welding is performed at a speed of 1.0 to 2.0 m / min by using three electrodes or more.
【０００８】なお、Ａｌ2Ｏ3：3〜13％、ＣＯ2：2〜8
％、Ｎａ2Ｏ：1〜5％、Ｆｅ−Ｓｉ：2〜10％、Ｆｅ−Ｍ
ｎ：2〜10％、Ｓｉ−Ｍｎ：2〜10％、Ｆｅ−Ｍｏ：2〜1
0％、Ｆｅ−Ｔｉ：2〜10％及びＢ2Ｏ3：2〜10％からな
る群から選択された少なくとも１種を含有していてもよ
い。Al 2 O 3 : 3 to 13%, CO 2 : 2 to 8
%, Na 2 O: 1 to 5%, Fe-Si: 2 to 10%, Fe-M
n: 2-10%, Si-Mn: 2-10%, Fe-Mo: 2-1
0%, Fe-Ti: 2~10 % and B 2 O 3: may contain at least one selected from the group consisting of 2-10%.
【０００９】[0009]
【作用】本願発明者等は、多電極を用いて高速片面サブ
マージアーク溶接において、特に表ビード裏ビードの健
全性を確保すべく種々実験研究を繰り返した結果、1.00
〜2.00m／分の高速で片面サブマージアーク溶接を行
い、健全な表ビード及び裏ビードを確保するためには、
施工条件（ワイヤ径、ワイヤ傾斜角度、結線、電極数又
は電極間距離、電流、電圧等）の選定も重要であるが、
それ以上に表側溶接に使用するフラックスの特性が極め
て重要な因子であることが判明した。The inventors of the present invention repeated various experimental studies in high-speed single-sided submerged arc welding using multiple electrodes to ensure the soundness of the front bead and the back bead.
In order to carry out single-sided submerged arc welding at a high speed of ~ 2.00 m / min and secure sound front and back beads,
Selection of construction conditions (wire diameter, wire inclination angle, connection, number of electrodes or distance between electrodes, current, voltage, etc.) is also important,
Furthermore, it has been found that the characteristics of the flux used for front side welding are extremely important factors.
【００１０】即ち、高速片面サブマージアーク溶接で
は、従来のフラックスを用いると、形状及び外観が良
く、十分且つ安定したビード幅を確保できず、またアン
ダーカットがない表ビードを確保することができない。
また、片面溶接では表側のフラックスが溶けてスラグと
なり裏ビード側にまわったりする。特に、高速溶接の場
合、表フラックスの組成及びスラグ量が裏ビードの安定
性に影響を及ぼす。本願発明は、これらの問題をフラッ
クスの特性を改善することで解決したものである。その
結果、本願請求項１に記載の条件で高速溶接した場合
は、健全な表ビード及び裏ビードを確保できることがわ
かった。That is, in the high-speed single-sided submerged arc welding, when the conventional flux is used, the shape and appearance are good, a sufficient and stable bead width cannot be secured, and the front bead without undercut cannot be secured.
Also, in single-sided welding, the flux on the front side melts and becomes slag, which turns to the back bead side. Particularly in the case of high speed welding, the composition of the front flux and the amount of slag affect the stability of the back bead. The present invention solves these problems by improving the characteristics of the flux. As a result, it was found that when the high-speed welding was performed under the conditions described in claim 1 of the present application, sound front and back beads could be secured.
【００１１】次に、上述のフラックスの組成限定理由及
び溶接条件の限定理由について説明する。なお、以下、
組成を表す％は重量％である。Next, the reason for limiting the composition of the flux and the reason for limiting the welding conditions will be described. Note that
The% representing the composition is% by weight.
【００１２】フラックス組成 ＳｉＯ2 ＳｉＯ2はガラス化成分であり、20％を超えると溶融ス
ラグ全体の粘性が増加し、スラグの流動性が悪くなるた
めに、高速片面サブマージアーク溶接の場合、表ビード
幅が広がらず、且つ不安定になり、アンダーカットが発
生しやすくなる。また、10％未満では溶融スラグの凝固
温度が高くなり過ぎ、良好な表ビード形状を確保できな
くなる。このため、ＳｉＯ2含有量は10乃至20％にす
る。 Flux composition SiO 2 SiO 2 is a vitrifying component, and if it exceeds 20%, the viscosity of the entire molten slag increases and the fluidity of the slag deteriorates. The width does not widen and becomes unstable, and undercut easily occurs. On the other hand, if it is less than 10%, the solidification temperature of the molten slag becomes too high, and a good surface bead shape cannot be secured. Therefore, the SiO 2 content is set to 10 to 20%.
【００１３】ＣａＯ，ＭｇＯ ＣａＯ及びＭｇＯはいずれも溶融スラグの粘度を低下さ
せ、スラグの流動性を高めて表ビード幅を広げる効果を
有する。ＣａＯは15％を超えると、溶融スラグの凝固温
度が高くなり過ぎ、表ビード形状が損なわれる。また、
ＣａＯが5％未満では溶融スラグの流動性を高める効果
が得られず、表ビード幅が不足し、アンダーカットが発
生しやすい。このため、ＣａＯは5乃至15％にする。 CaO, MgO CaO and MgO all have the effect of lowering the viscosity of the molten slag, increasing the fluidity of the slag and widening the surface bead width. When CaO exceeds 15%, the solidification temperature of the molten slag becomes too high and the surface bead shape is impaired. Also,
If CaO is less than 5%, the effect of increasing the fluidity of the molten slag cannot be obtained, the width of the front bead is insufficient, and undercut is likely to occur. Therefore, CaO is set to 5 to 15%.
【００１４】ＭｇＯは高融点の成分であることから、そ
の含有量が30％を超えると、フラックス全体の溶融性が
損なわれ、特に、小入熱になる薄板の高速片面サブマー
ジアーク溶接を行う場合に安定したビードを確保できな
くなる。また、ＭｇＯの含有量が20％以下では溶融スラ
グの流動性を高める効果が得られず、表ビード幅が不足
し、アンダーカットが発生しやすくなる。このため、Ｍ
ｇＯ含有量は20乃至30％にする。Since MgO is a component with a high melting point, if its content exceeds 30%, the meltability of the entire flux is impaired, especially when high-speed single-sided submerged arc welding of thin plates with small heat input is performed. It becomes impossible to secure a stable bead. Further, if the content of MgO is 20% or less, the effect of enhancing the fluidity of the molten slag cannot be obtained, the width of the front bead becomes insufficient, and undercut easily occurs. Therefore, M
The gO content is 20 to 30%.
【００１５】ＴｉＯ2 ＴｉＯ2は、特に高速溶接を行ったときのスラグ剥離性
の改善に有効な成分であるが、18％を超えるとビード波
が粗くなるという短所があり、また、8％以下では、ス
ラグ剥離性の改善効果は得られない。このため、ＴｉＯ
2の含有量は8乃至18％にする。 TiO 2 TiO 2 is an effective component for improving the slag removability particularly when high-speed welding is performed, but if it exceeds 18%, there is a disadvantage that the bead wave becomes coarse, and if it is 8% or less. Then, the effect of improving the slag removability cannot be obtained. Therefore, TiO
The content of 2 is 8 to 18%.
【００１６】Ｆ Ｆは通常ＣａＦ2、ＮａＦ等のフッ化物として添加する
が、いずれもフラックス全体の溶融性を良くする成分で
あって、特に高速片面サブマージアーク溶接のように、
短時間にフラックスを溶かし、スラグを生成しなければ
ならない溶接方法においては、不可欠な成分である。し
かし、Ｆ含有量が8％を超えると、スラグ生成量が過剰
となり、表ビード形状が不安定になると共に、裏側に溶
融スラグがまわりやすくなるため、裏ビードが不安定に
なる。一方、Ｆ含有量が2％未満ではフラックスの溶融
性改善効果が得られない。このため、フッ化物はＦ換算
で2乃至8％にする。[0016] F F typically is added as the fluoride of CaF 2, NaF, etc., either be a component to improve the melting of the entire flux, in particular as high-speed single-sided submerged arc welding,
It is an indispensable component in the welding method in which the flux must be melted in a short time to form slag. However, when the F content exceeds 8%, the amount of slag produced becomes excessive, the shape of the front bead becomes unstable, and the molten slag easily rotates around the back side, so that the back bead becomes unstable. On the other hand, if the F content is less than 2%, the effect of improving the meltability of the flux cannot be obtained. Therefore, the fluoride content is 2 to 8% in terms of F.
【００１７】鉄粉 鉄粉は一度に多量の溶着金属を必要とする片面サブマー
ジアークの場合は、従来の溶接速度の場合においても必
要な添加成分であったが、特に高速片面サブマージアー
ク溶接を行うフラックスの場合は、鉄粉は溶着金属量を
補う目的からも重要な役割をもつ。このため、10％以上
の鉄粉を含有する。鉄粉含有量が10％未満では密着金属
量を補う効果が得られなくなることと、フラックスの見
掛密度が小さくなることから、溶接作業性（吹き上げ）
が劣化する。しかし、30％を超える鉄粉を含有させる
と、高速溶接では冷却が速く、溶融金属の凝固が速いこ
とから、ビード表面に鉄粒が付着しやすくなることと、
フラックスの見掛密度が高くなり、ビード幅が確保でき
なくなることから、上限は30％におさえることが必要で
ある。このため、鉄粉は10乃至30％にする。より好まし
くは、鉄粉含有量は25％以下に抑えることが望ましい。 Iron powder Iron powder was a necessary additive component even in the case of the conventional welding speed in the case of one-sided submerged arc which requires a large amount of deposited metal at one time, but particularly high-speed one-sided submerged arc welding is performed. In the case of flux, iron powder also plays an important role for the purpose of supplementing the amount of deposited metal. Therefore, it contains 10% or more of iron powder. If the iron powder content is less than 10%, the effect of supplementing the amount of adherent metal cannot be obtained, and the apparent density of the flux becomes small, so welding workability (blowing)
Deteriorates. However, when the iron powder content exceeds 30%, the high speed welding cools quickly, and the solidification of the molten metal is fast, which makes it easy for iron particles to adhere to the bead surface.
Since the apparent density of the flux becomes high and the bead width cannot be secured, it is necessary to keep the upper limit to 30%. For this reason, iron powder should be 10 to 30%. More preferably, the iron powder content is desirably suppressed to 25% or less.
【００１８】その他の成分 その他の成分としては、作業性の点で、Ａｌ2Ｏ3：3〜1
3％、ＣＯ2：2〜8％、Ｎａ2Ｏ：1〜5％を含有しても良
い。また、溶接金属の目標とする機械的性質に応じて、
Ｆｅ−Ｓｉ，Ｆｅ−Ｍｎ，Ｓｉ−Ｍｎ，Ｆｅ−Ｍｏ，Ｆ
ｅ−Ｔｉ，Ｂ2Ｏ3等の合金を１種又は２種以上、全フラ
ックスに対して2〜10％添加することもできる。 Other components As other components, from the viewpoint of workability, Al 2 O 3 : 3-1 to 3
3%, CO 2: 2~8% , Na 2 O: may contain 1 to 5%. Also, depending on the target mechanical properties of the weld metal,
Fe-Si, Fe-Mn, Si-Mn, Fe-Mo, F
One or more alloys such as e-Ti and B 2 O 3 may be added in an amount of 2 to 10% with respect to the total flux.
【００１９】見掛密度 高速片面サブマージアーク溶接ではフラックスの見掛密
度が表ビード幅の広がり及び形状の安定性に大きな影響
を及ぼす。フラックスの見掛密度が1.30g/cm3を超える
と、溶融スラグの流動性が阻害され、表ビード幅が広が
りにくくなると共に、ビード形状が不安定になり、アン
ダーカットも発生しやすくなる。また、1.05g/cm3未満
ではガスによる溶融スラグの吹き上げが多くなる。特に
先行電極による溶融スラグの吹き上げスラグが非定常に
形成されるために、後行電極によって再溶融するときに
アークが不安定となって表ビード形状が劣化する。 Apparent density In high speed single-sided submerged arc welding, the apparent density of the flux has a great influence on the spread of the surface bead width and the stability of the shape. When the apparent density of the flux exceeds 1.30 g / cm 3 , the fluidity of the molten slag is hindered, the width of the front bead becomes difficult to widen, the bead shape becomes unstable, and undercut easily occurs. If it is less than 1.05 g / cm 3 , gas blows up the molten slag more often. In particular, the blow-up slag of the molten slag formed by the leading electrode is unsteady, so that the arc becomes unstable and the surface bead shape is deteriorated when remelted by the trailing electrode.
【００２０】フラックス粒度 フラックスの粒度は高速片面サブマージアーク溶接の場
合、溶融プールの移動速度が速いために、短時間の間に
均一に且つ適正量のフラックスが溶けなければならな
い。従って、粗い粒子が多すぎると均一溶融性が損なわ
れるので、粒径が840μｍを超える粒子は全フラックス
に対して20％未満にする必要がある。一方、細かい粒子
が多すぎると、溶融金属及びフラックスから発生するガ
スのガス抜けが悪くなって、表ビード表面にポックマー
ク等のガス欠陥が発生し易くなるので、粒径が297μｍ
未満の粒子は20％未満にする必要がある。そして、これ
らの中間の粒子である粒径が297乃至840μｍの粒子は、
60％以上にする。中間粒子である297〜840μｍの粒子
は、ガス抜けが良く、均一溶融性の点からも好ましい粒
子径である。特に、高速片面サブマージアーク溶接で
は、この粒子がフラックス全体の６０％以下になると、
表ビードの形状及び外観の安定性が保てなくなる。 Flux Grain Size In the case of high-speed single-sided submerged arc welding, the flux grain size must be uniform and an appropriate amount of flux must be melted in a short time because the moving speed of the molten pool is high. Therefore, if too many coarse particles are used, uniform meltability will be impaired. Therefore, the amount of particles having a particle size of more than 840 μm needs to be less than 20% of the total flux. On the other hand, if the amount of fine particles is too large, the gas generated from the molten metal and the flux will not escape easily, and gas defects such as pock marks will easily occur on the surface bead surface, so the particle size is 297 μm.
Less than 20% of particles should be less than 20%. And, particles having a particle size of 297 to 840 μm, which are intermediate particles, are
60% or more. Particles of 297 to 840 μm, which are intermediate particles, have a preferable gas diameter from the viewpoint of good outgassing and uniform meltability. Especially in high-speed single-sided submerged arc welding, when the amount of these particles is 60% or less of the total flux,
The shape and appearance of the front beads cannot be kept stable.
【００２１】電極数 1.00〜2.00m／分の高速で健全な表ビード、裏ビード及
び溶け込み形状を確保するためには、３電極以上が必要
である。高速溶接の場合、先ず第１電極では鋼板裏面側
まで溶かし、穴をあける程度の役割が限界であり、第１
電極のみでは安定した裏ビードを形成することができな
い。そこで、第２電極で互いに掘り下げると同時に溶着
金属を補って安定した裏ビードを形成することとなる。
従って、安定した裏ビードを形成ために最低２電極が必
要であり、表ビードと健全溶け込み形状を確保するのは
後続電極の第３電極及びそれ以降の電極の役割となる。
各電極のワイヤ径及び溶接条件などは、板厚及び目標溶
接速度を適宜選択すれば良いが、第１電極としてワイヤ
径が4.0〜4.8mmのものを用い、1200〜1550Ａの電流を流
し、第２電極としてワイヤ径が4.8〜6.4mmのものを用
い、第１電極の電流をＩ1、第２電極に流す電流をＩ2と
したとき、Ｉ2／Ｉ1＝0.60〜1.00の範囲に設定し、ま
た、第１電極と第２電極との極間距離を15〜70mm、第２
電極と第３電極との極間距離を140〜250mmとして溶接を
行うと、一層良好な表ビード、裏ビード及び健全な溶け
込み形状が得られる。[0021] In order to secure a healthy front bead, back bead, and melted shape at a high speed of the number of electrodes of 1.00 to 2.00 m / min, three or more electrodes are required. In the case of high-speed welding, the role of melting the first electrode to the back side of the steel plate and making a hole is the limit.
A stable back bead cannot be formed only by the electrode. Therefore, the second electrode is dug at the same time, and at the same time, the deposited metal is supplemented to form a stable back bead.
Therefore, at least two electrodes are required to form a stable back bead, and it is the third electrode of the succeeding electrode and the subsequent electrodes to secure the front bead and the sound melting shape.
For the wire diameter and welding conditions of each electrode, the plate thickness and the target welding speed may be appropriately selected, but a wire having a wire diameter of 4.0 to 4.8 mm is used as the first electrode, and a current of 1200 to 1550 A is applied to When the wire diameter of 4.8 to 6.4 mm is used as the two electrodes, and the current of the first electrode is I 1 and the current to be passed to the second electrode is I 2 , the range of I 2 / I 1 = 0.60 to 1.00 is set. The distance between the first electrode and the second electrode between 15 and 70 mm,
When welding is performed with the electrode-to-electrode distance between the electrode and the third electrode being 140 to 250 mm, a better front bead, a back bead and a sound penetration shape can be obtained.
【００２２】その他 本発明は片面サブマージアーク溶接方法であるが、裏当
方法については、フラックスを裏当材とするフラックス
バッキング法、及びフラックスと銅を裏当材とするフラ
ックス銅バッキング法等、いずれの方法も適用できる。
また、裏当フラックスについても、従来のフラックスが
そのまま適用でき特に限定されるものではない。 Others Although the present invention is a single-sided submerged arc welding method, the backing method includes a flux backing method using flux as a backing material and a flux copper backing method using flux and copper as a backing material. The method of can also be applied.
Also, as the backing flux, the conventional flux can be applied as it is and is not particularly limited.
【００２３】[0023]
【実施例】次に、本発明の実施例についてその比較例と
比較して説明する。下記表１に示す銅板及び表２に示す
ワイヤを使用し、下記表３に示す溶接条件により片面サ
ブマージアーク溶接した。そして、フラックス組成を下
記表４に、フラックス粒度等の各種特性を下記表５に、
溶接試験結果を下記表６に夫々示す。また、この片面サ
ブマージアーク溶接は、銅板の上に裏当フラックスを5
〜6mmの一定の厚さに散布し、銅板裏当材に押し当てて
溶接するフラックス銅裏当法で実施したが、銅板を使用
せずに裏当フラックスを固化させながら行うフラックス
裏当法においても、本実施例とほぼ同様な結果が得られ
た。EXAMPLES Next, examples of the present invention will be described in comparison with comparative examples. Using one of the copper plates shown in Table 1 below and the wires shown in Table 2, single-sided submerged arc welding was performed under the welding conditions shown in Table 3 below. The flux composition is shown in Table 4 below, and various characteristics such as flux particle size are shown in Table 5 below.
The welding test results are shown in Table 6 below. In addition, this single-sided submerged arc welding uses a backing flux on a copper plate.
The flux backing method was carried out by spraying to a constant thickness of ~ 6 mm, pressing it against the copper plate backing material and welding, but in the flux backing method performed while solidifying the backing flux without using a copper plate. Also, almost the same results as in this example were obtained.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【表２】 [Table 2]
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【表４】 [Table 4]
【００２８】[0028]
【表５】 [Table 5]
【００２９】[0029]
【表６】 [Table 6]
【００３０】この表６から明らかなように、テスト番号
４，７，１５の場合は、見掛け密度が大きいために、ビ
ード表面に小さな鉄粉粒が若干付着した。テスト番号
７，８，１１〜１４，１５の場合は、組成が本発明の範
囲から外れるために、ビード幅が不足すると共に、ビー
ドが不安定である。テスト番号１６は見掛け密度が小さ
いと共に鉄粉含有量が少ないために、ビードの余盛が不
足した。これに対し、本願発明の範囲にはいる条件で溶
接した場合には、ビード幅の広がり、安定性、形状、外
観のいずれも極めて良好であった。As is apparent from Table 6, in the case of test numbers 4, 7, and 15, small apparently small iron powder particles adhered to the bead surface due to the large apparent density. In the case of the test numbers 7, 8, 11-14, 15, the composition is out of the range of the present invention, so that the bead width is insufficient and the bead is unstable. In Test No. 16, the apparent density was low and the iron powder content was low, so the bead excess was insufficient. On the other hand, when welding was performed under the conditions falling within the scope of the present invention, the bead width spread, stability, shape, and appearance were all very good.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
フラックスの組成等の条件を適切に設定したので、1.0
乃至2.0m／分の高速度で片面サブマージアーク溶接をし
ても、健全な表ビード及び裏ビードを得ることができ
る。As described above, according to the present invention,
Since the conditions such as flux composition were set appropriately, 1.0
Even if single-sided submerged arc welding is performed at a high speed of up to 2.0 m / min, sound front and back beads can be obtained.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−9795（ＪＰ，Ａ) 特開 平５−57448（ＪＰ，Ａ) 特開 昭59−137194（ＪＰ，Ａ) 特公 平１−31996（ＪＰ，Ｂ２) 特公 昭45−31370（ＪＰ，Ｂ１) 特公 昭57−31516（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP 58-9795 (JP, A) JP 5-57448 (JP, A) JP 59-137194 (JP, A) JP 1- 31996 (JP, B2) JP-B-45-31370 (JP, B1) JP-B-57-31516 (JP, B2)
Claims (4)
ａＯ；５〜１５％、ＭｇＯ；２０〜３０％、ＴｉＯ2；
８〜１８％、Ｆ；２〜８％及び鉄粉；１０〜３０％を含
有し、重量％で粒径が８４０μｍを超える粒子が２０％
未満、２９７乃至８４０μｍの粒子が６０％以上、２９
７μｍ未満の粒子が２０％未満であり、見掛密度が１．
０５乃至１．３０ｇ／ｃｍ3であることを特徴とする片
面サブマージアーク溶接用フラックス。1. By weight%, SiO 2 ; 10-20%, C
aO; 5~15%, MgO; 20~30 %, TiO 2;
8 to 18%, F; 2 to 8% and iron powder; 10 to 30%, and 20% by weight of particles having a particle size of more than 840 μm.
Less than 297 to 840 μm, 60% or more of particles, 29
Less than 20% of particles are less than 7 μm and have an apparent density of 1.
Flux for single-sided submerged arc welding, characterized in that it is from 05 to 1.30 g / cm 3 .
ａＯ；５〜１５％、ＭｇＯ；２０〜３０％、ＴｉＯ2；
８〜１８％、Ｆ；２〜８％及び鉄粉；１０〜３０％を含
有し、残部が不可避的不純物であるフラックスであっ
て、重量％で粒径が８４０μｍを超える粒子が２０％未
満、２９７乃至８４０μｍの粒子が６０％以上、２９７
μｍ未満の粒子が２０％未満であり、見掛密度が１．０
５乃至１．３０ｇ／ｃｍ3であることを特徴とする片面
サブマージアーク溶接用フラックス。2. By weight%, SiO 2 ; 10-20%, C
aO; 5~15%, MgO; 20~30 %, TiO 2;
8 to 18%, F; 2 to 8% and iron powder; containing 10 to 30%, the remaining part is a flux is inevitable impurities, particle having a particle size exceeding 840μm in weight percent less than 20% 297 to 840 μm particles are 60% or more, 297
Less than 20% of particles less than μm and an apparent density of 1.0
A flux for single-sided submerged arc welding, which is 5 to 1.30 g / cm 3 .
ａＯ；５〜１５％、ＭｇＯ；２０〜３０％、ＴｉＯ2；
８〜１８％、Ｆ；２〜８％及び鉄粉；１０〜３０％を含
有し、更にＡｌ2Ｏ3；３〜１３％、ＣＯ2；２〜８％、
Ｎａ2Ｏ；１〜５％、Ｆｅ−Ｓｉ；２〜１０％、Ｆｅ−
Ｍｎ；２〜１０％、Ｓｉ−Ｍｎ；２〜１０％、Ｆｅ−Ｍ
ｏ；２〜１０％、Ｆｅ−Ｔｉ；２〜１０％及びＢ2Ｏ3；
２〜１０％からなる群から選択された少なくとも１種を
含有し、残部が不可避的不純物であるフラックスであっ
て、重量％で粒径が８４０μｍを超える粒子が２０％未
満、２９７乃至８４０μｍの粒子が６０％以上、２９７
μｍ未満の粒子が２０％未満であり、見掛密度が１．０
５乃至１．３０ｇ／ｃｍ3であることを特徴とする片面
サブマージアーク溶接用フラックス。3. By weight%, SiO 2 ; 10-20%, C
aO; 5~15%, MgO; 20~30 %, TiO 2;
8 to 18%, F; 2 to 8% and iron powder; 10 to 30%, and further Al 2 O 3 ; 3 to 13%, CO 2 ; 2 to 8%,
Na 2 O; 1~5%, Fe -Si; 2~10%, Fe-
Mn; 2-10%, Si-Mn; 2-10%, Fe-M
o; 2~10%, Fe-Ti ; 2~10% and B 2 O 3;
A flux containing at least one selected from the group consisting of 2 to 10%, the balance being an unavoidable impurity, and less than 20% of particles having a particle diameter of more than 840 μm in weight% is 297 to 840 μm. Is over 60%, 297
Less than 20% of particles less than μm and an apparent density of 1.0
A flux for single-sided submerged arc welding, which is 5 to 1.30 g / cm 3 .
ａＯ；５〜１５％、ＭｇＯ；２０〜３０％、ＴｉＯ2；
８〜１８％、Ｆ；２〜８％及び鉄粉；１０〜３０％を含
有し、重量％で粒径が８４０μｍを超える粒子が２０％
未満、２９７乃至８４０μｍの粒子が６０％以上、２９
７μｍ未満の粒子が２０％未満であり、見掛密度が１．
０５乃至１．３０ｇ／ｃｍ3のボンドフラックスを使用
し、３電極又はそれ以上の電極を使用して１．０乃至
２．０ｍ／分の速度で溶接を行うことを特徴とする片面
サブマージアーク溶接方法。4. By weight%, SiO 2 ; 10-20%, C
aO; 5~15%, MgO; 20~30 %, TiO 2;
8 to 18%, F; 2 to 8% and iron powder; 10 to 30%, and 20% by weight of particles having a particle size of more than 840 μm.
Less than 297 to 840 μm, 60% or more of particles, 29
Less than 20% of particles are less than 7 μm and have an apparent density of 1.
One-sided submerged arc welding, characterized in that a bond flux of 05 to 1.30 g / cm 3 is used and welding is performed at a speed of 1.0 to 2.0 m / min using three or more electrodes. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070025A JP2672243B2 (en) | 1993-03-29 | 1993-03-29 | Flux for single-sided submerged arc welding and welding method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070025A JP2672243B2 (en) | 1993-03-29 | 1993-03-29 | Flux for single-sided submerged arc welding and welding method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06277878A JPH06277878A (en) | 1994-10-04 |
| JP2672243B2 true JP2672243B2 (en) | 1997-11-05 |
Family
ID=13419653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5070025A Expired - Lifetime JP2672243B2 (en) | 1993-03-29 | 1993-03-29 | Flux for single-sided submerged arc welding and welding method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2672243B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564807B (en) * | 2008-04-25 | 2012-02-22 | 株式会社神户制钢所 | Backing welding flux used for single-side submerged arc welding and the single-side submerged arc welding method using the same |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3336244B2 (en) * | 1998-01-27 | 2002-10-21 | 川崎製鉄株式会社 | High temperature firing type flux for submerged arc welding and method for producing the same |
| JPH11254183A (en) * | 1998-03-16 | 1999-09-21 | Nippon Steel Weld Prod & Eng Co Ltd | Bond flux for submerged arc welding and its manufacture |
| KR101157572B1 (en) * | 2010-10-26 | 2012-06-19 | 현대종합금속 주식회사 | Titania type flux cored wire |
| JP5628082B2 (en) * | 2011-04-12 | 2014-11-19 | 日鐵住金溶接工業株式会社 | Bond flux for multi-electrode single-sided submerged arc welding |
| JP2013154363A (en) * | 2012-01-27 | 2013-08-15 | Kobe Steel Ltd | Flux for one side submerged arc welding |
| JP5874068B2 (en) * | 2012-01-27 | 2016-03-01 | 株式会社神戸製鋼所 | Flux for single-sided submerged arc welding |
| CN103521950B (en) * | 2013-10-23 | 2015-09-30 | 天津市永昌焊丝有限公司 | Low-temperature high-toughness submerged arc welding flux medicinal powder |
| JP6908547B2 (en) * | 2018-03-06 | 2021-07-28 | 日鉄溶接工業株式会社 | Bond flux for multi-electrode single-sided submerged arc welding |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5731516A (en) * | 1980-08-02 | 1982-02-20 | Dantani Plywood Co | Manufacture of inorganic board material |
| JPS589795A (en) * | 1981-07-10 | 1983-01-20 | Nippon Steel Corp | Flux for submerged arc welding by belt-like electrode |
| JPS59137194A (en) * | 1983-01-28 | 1984-08-07 | Kawasaki Steel Corp | Baked flux for high speed submerged arc welding |
| JPS6431996A (en) * | 1987-07-28 | 1989-02-02 | Nippon Steel Corp | Method for preventing coagulation of fine grain in electroplating bath |
| JP2538815B2 (en) * | 1991-08-30 | 1996-10-02 | 川崎製鉄株式会社 | Highly efficient fillet welding method for thick steel plate |
-
1993
- 1993-03-29 JP JP5070025A patent/JP2672243B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564807B (en) * | 2008-04-25 | 2012-02-22 | 株式会社神户制钢所 | Backing welding flux used for single-side submerged arc welding and the single-side submerged arc welding method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06277878A (en) | 1994-10-04 |
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